Wrench



A. E. CARLBERG Sept. 8, 1925.

WRENCH Filed Aug. 5. 1922 Patented Sept. 8, 1925.

uNiTEo STA- res PA-TENT o-FFI c-Ei AUGUST EDWIN CAEIJBE'RQCE WORCESTER, MASSACHUSETTS, AssIGNon. To WALDEN- WORCESTER, INC, OF WORCESTER, MASSACHUSETTS, A CORPORATION CE MASSA- CHUSETTS.

WRENCH.

Application filed August 5, 1922. Serial no. 579,805.

To all whom 2' may concern Be it knownthat I, AUGUST EDWIN OARL-' BERG, a citizen of the United States, residing in the city of lVor'cester, county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Wrenches, of which the following is a specification. a v

This invention relates to wrenches and particularly to wrenches of the so-called- Speeder type, having a crankshaft formed like the well-known carpenters brace.

It has for its object to provide on such a wrench an arm of greater length than that of the crank, so that the said arm may be employed for the initial loosening or final tightening of a nut or bolt, the crank being employed in the usual manner for rapidly.

unscrewing the loosenednut or bolt or spinning it into position before the final tightening operation. The combined wrench of the present invention is thus capable of performing the function of either of two distinctly different types of wrenches commonly employed in the art. It is thus applicable to a wide variety of different purposes, but particularly for use as a. wrench for the nuts employed in conjunction with demountable rims on automotive vehicles, as for such use economy of time and convenience of handling are factors of prime consideration.

A good understanding of the invention may now be had from the following description thereof, having reference to the accompanying drawing in which is shown a plan View of one type of wrench embodying my invention.

In this drawing, the wrench is illustrated as being comprised of a shank 1, a handle 2 and a socket member 3. The-handle 2 is swivelly mounted on the upper end of the shank and the socket 3 is securely fixed on the lower end of the shank in any suitable manner.

The shank is formed of stout wire or steel rod and consists of a substantially crankshaped part a, provided at one extremity with a radial extension I). The entire shank is preferably formed of a single piece of material, the radial extension being formed by a loop bent outwardly from the crank portion a. The radius of the crank is indicated by no and the mean radius of the extension is indicated by 1 The leverage obtainable by means of extension?) is thus considerably greater than that which may be had by using the crank. r

The manner of use of the combined tool of the present invention will now be readily understood. a

To unscrew a nut or bolt, the operator places the'socket 3 over the nut or head of the bolt, places the one hand ordinarily the left) on handle 2 and the other on the loop Z) and applies turning force until the nut or boltubecomes loosened. 'He then changes his grip from the extension I) to the is'spun home by holdin the tool as just described, and is" thereupon tightened by changing the grip from the handle a to extension band applying one or more thrusts so as to drive the nut or bolt firmly into position. It will thus be seen that one of the great advantages of the present tool lies in the fact that it may be caused to perform the function of two entirely distinct types of wrenches without necessitating the removal of the socket from the bolt 0r nut, the only change necessary being in the position of the one hand (generally the right), which is placed on the handle of the crank when the nut or bolt is to be turned rapidly, and placed on the extension I) when the same is to be subjected to a large turning force. The wrench is thus not only extremely conyenient in actual use, but capable of affording a great saving in time.

An advantage of the present form of construction of the combined wrench consists in the fact that extension I) is at right angles to the center line zz of the socket" member and handle, and is thus in the position best part of the crank close to the socket 3, so that a better hold may be obtained on the bolt or nut during. the tightening or loosening operation.

It will be observed, moreover, that by providing the extension I), capable of yielding the necessary leverage for the tightening or loosening of the nut or bolt, the radius of the crank may be made somewhat smaller than that normally employed in corresponding sizes of ordinary speeder wrenches, so that the hand of the operator will traverse a considerably shorter distance in spinning the nut or bolt, so that a noticeable saving of time may be effected in this partof the operation.

Although I have herein shown and described only one form of wrench embodying my invention, it will be readily understood that many changes and modifications may be made therein, within the scope of the following claims, without departing from the spirit and scope of the invention, it being my intention to claim the same broadly in whatever form its principles may be employed.

WVhat I claim is: a

1. A brace wrench having coaxial tips, and a one-piece shank extending between said tips, said shank including eccentric handles of different radii on the same side of the axis of said tips and different length longitudinally of the wrench, the handle of the shorter radius and longest length being parallel to the axis of said tips and the handle of the longer radius and shortest length being substantially normal to the axis of said tips.

2. A wrench having a revolvable head member, a coaxial socket, an intermediate operating member including a radius arm secured to the head member, a handle secured to said arm and extending parallel to the axis of rotation, a shank for the socket, a radius arm secured to said shank and extending in abutting relation with said handle, and a loop connection between said handle and the end of said second radius arm.

3. A wrench having spaced end members on the axis of rotation, an intermediate operating member including a sloping radius arm connected to one end member, a handle connected to said arm and extending parallel to said axis, a second radius arm connected to the other end member, extending at right angles to said axis and connected to said handle, and a second handle formed by extending said second radius arm beyond the first handle.

In testimony whereof I have aflixed my signature to this specification.

AUGUST EDWVIN CAR-LBERG; 

